cpu/x86/mp_init.c: Prolong delay on synchronous API

When each AP needs to do a lot of printing 1 sec is not enough.

Change-Id: I00f0a49bf60f3915547924c34a62dd0044b0c918
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64828
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kane Chen <kane.chen@intel.corp-partner.google.com>

src/cpu/x86/mp_init.c

@@ -1041,9 +1041,9 @@ enum cb_err mp_run_on_all_cpus_synchronously(void (*func)(void *), void *arg)
 	/* Run on BSP first. */
 	func(arg);
 
-	/* For up to 1 second for AP to finish previous work. */
+	/* For up to 1 second per AP (console can be slow) to finish previous work. */
 	return mp_run_on_aps_and_wait_for_complete(func, arg, MP_RUN_ON_ALL_CPUS,
-						1000 * USECS_PER_MSEC);
+						   1000 * USECS_PER_MSEC * global_num_aps);
 }
 
 enum cb_err mp_park_aps(void)

src/include/cpu/x86/mp.h

@@ -122,7 +122,7 @@ enum cb_err mp_run_on_all_aps(void (*func)(void *), void *arg, long expire_us,
 enum cb_err mp_run_on_all_cpus(void (*func)(void *), void *arg);
 
 /* Like mp_run_on_all_cpus but make sure all APs finish executing the
-   function call. The time limit on a function call is 1 second. */
+   function call. The time limit on a function call is 1 second per AP. */
 enum cb_err mp_run_on_all_cpus_synchronously(void (*func)(void *), void *arg);
 
 /*